Soto is an Indonesian cuisine mainly comprised of broth and vegetables. The meats that most commonly used are beef and chicken, but there are also sotos with mutton and pork. There are many varieties of sotos in Indonesia, which vary by regions, class, and ethnicity. Some well known variations are soto Madura (from East Java), soto Betawi (from Jakarta), soto Padang (from West Sumatra), soto Bandung (from West Java), soto Banjar (from South Kalimantan), and coto Makassar (from South Sulawesi). All of these sotos have distinctive flavor.
Each soto has a unique/different style of serving. For example, some soto served with boiled egg, kerupuk, perkedel (mash potatoes with meat), sambal, etc. And as we know that a lot of Indonesian people eat rice, so it became a "best friend" of soto. Beside rice, sometimes people eat soto with rice cake or noodle.